Investigation of Copper Speciation in Pig Slurry by a Multitechnique Approach
2010
Legros, Samuel | Chaurand, Perrine | Rose, Jérôme | Masion, Armand | Briois, Valérie | Ferrasse, Jean-Henry | Saint Macary, Hervé | Bottero, Jean-Yves | Doelsch, Emmanuel | Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) ; Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) | Laboratoire pour l'utilisation du rayonnement électromagnétique (LURE) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-MENRT-Centre National de la Recherche Scientifique (CNRS) | Laboratoire de Mécanique, Modélisation et Procédés Propres (M2P2) ; Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS) | Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) | Recyclage et risque (UPR Recyclage et risque) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)
International audience
اظهر المزيد [+] اقل [-]إنجليزي. It is now well-known that copper (Cu) can accumulate on the surface of soils upon which pig slurry has been applied. This is due to the high quantity of Cu in pig slurry resulting from its use as a growth promoter in animal feeds. The mobility and bioavailability of Cu from pig slurry spreading can be better predicted by determining the speciation of this element in addition to its total concentration. The aim of this study was to present a multitechnique approach to investigate Cu speciation in pig slurry. First, size fractionation and chemical characterization of each size fraction were performed to complement results obtained in raw samples. Micro X-ray fluorescence spectroscopy (mu XRF) highlighted the colocalization of Cu and sulfur (S). Finally, X-ray absorption near-edge structure spectroscopy (XANES) showed that Cu speciation in raw pig slurry and size fractions could be described by Cu(2)S and that its oxidation state is Cu(I). In addition, geochemical calculation demonstrated that chalcocite (Cu(2)S) was the major Cu species present under pig slurry lagoon physical-chemical conditions. This Cu speciation in pig slurry may be the main reason for the observed Cu accumulation at the soil surface.
اظهر المزيد [+] اقل [-]المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Institut national de la recherche agronomique